Ahio, 24, last fought in March when he defeated Clarence Tillman (11-20-2) on the undercard of a Super 8 event in Christchurch via first round TKO.
Ahio's handlers have struggled to get him local opponents and Iakopo shouldn't pose much of a test for him, despite the cautious words of Ahio's trainer Lolo Heimuli.
"He's the kind of guy you can't allow in the fight at any stage, he's very tough, comes to fight, and if he gets a sniff, will be all over you," Heimuli said of Iakopo.
"We must jump on him early or it will be a tough night at the office for Hemi."
Betham (7-1) also fought on that Super 8 card in Christchurch in March when he defeated former English cricketer Adam Hollioake (2-2) via TKO in the fourth round of their cruiserweight bout.
The 37-year-old said he had been itching to get back in the ring since dusting Hollioake.
"I haven't stopped thinking about a return," the former Warriors hardman said. "There may be a stage shortly where I might just put it out there and ask whoever's interested."